Semaglutide
Semaglutide Tracker
Semaglutide is the active molecule behind Ozempic, Wegovy, and Rybelsus, and the compounded versions many people use through telehealth clinics. Because the same molecule shows up under several brand names at different dose ranges, keeping a clean record of exactly what you took and when matters more here than with almost any other medication. Myo gives semaglutide its own timeline regardless of which brand or pharmacy your vial or pen came from.
As a once-weekly GLP-1 receptor agonist with a long half-life of roughly seven days, semaglutide builds to steady levels over weeks. That slow build is why titration is deliberate and why a single missed or doubled dose can quietly shift how you feel days later. Myo's medication-level view plots that pharmacokinetic curve so you can see where you actually are in the week, not just guess.
The part most weight-loss apps ignore: rapid appetite suppression can pull lean muscle down alongside fat. Myo is built muscle-first, so alongside your semaglutide log it tracks protein intake, resistance-training consistency, and body-composition trends - the signals that tell you whether you're losing the right kind of weight.
Semaglutide at a glance
- Drug class
- GLP-1 receptor agonist
- Active molecule
- Semaglutide
- Maker
- Novo Nordisk
- Brand names
- Ozempic, Wegovy, Rybelsus
- Injection frequency
- Once weekly (subcutaneous)
- Half-life
- Approximately 7 days
What Myo tracks for Semaglutide
- Weekly dose and the exact mg strength, across brand or compounded vials
- Injection-site rotation so the same spot isn't reused week to week
- Where you sit on the ~7-day pharmacokinetic curve between shots
- Protein intake and resistance-training sessions to defend lean mass
- Body-composition trend - fat vs. muscle, not just total body weight
Side effects worth logging
Logging symptoms against your dose timing helps you and your prescriber spot patterns. Commonly reported Semaglutide side effects include:
- Nausea, especially in the first day or two after a dose or after a step-up
- Constipation or diarrhea
- Vomiting
- Acid reflux, heartburn, or sulfur burps
- Fatigue and reduced appetite
- Injection-site redness or irritation
Free Semaglutide calculators
GLP-1 Dose Converter (mg, mL, units)
Convert between milligrams, millilitres, and insulin-syringe units for a known vial concentration, with an mg to mcg helper.
Open the toolGLP-1 Medication Level Visualizer
See an illustrative curve of how a weekly GLP-1 builds up to steady state, based on its half-life.
Open the toolGLP-1 Titration Schedule Planner
Build a dated, fully editable titration schedule from a start date and your own dose steps.
Open the toolSemaglutide guides
Semaglutide tracking FAQ
Does Myo track semaglutide across different brands?
Yes. Semaglutide is the same molecule whether it comes from an Ozempic pen, a Wegovy pen, or a compounded vial, so Myo keeps one continuous semaglutide timeline. If you switch sources or strengths, you log the change and your dose history stays intact.
How does semaglutide's long half-life affect tracking?
At roughly a seven-day half-life, semaglutide stays in your system the full week and accumulates over the first month or two. Myo's medication-level visualizer shows that build-up and where you are in the weekly cycle, which is useful context if you're noting why side effects cluster on certain days.
Can Myo show whether I'm losing muscle on semaglutide?
Myo can't take a measurement for you, but it trends the inputs that matter - protein intake, training frequency, and the body-composition figures you log - so muscle loss shows up as a pattern instead of a surprise. Always confirm concerns with your prescriber.
What should I do if I miss a semaglutide dose?
That's a prescriber question, and the answer depends on how many days have passed. Myo's job is to keep an accurate record of when your last dose actually landed so you and your clinician are working from real data, not memory.
Track Semaglutide the muscle-first way
Log every dose, protect your lean mass, and see whether you're losing fat or muscle.